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Start ShoppingMIKUNI FN100606-127.5 Low Speed Jet - High-Performance Intake System for Powersports
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Description
Upgrade your powersports engine's performance with the MIKUNI FN100606-127.5 Low Speed Jet. This high-quality intake system delivers precise fuel-air mixture control, ensuring reliable power output and improved fuel efficiency for a wide range of off-road and utility vehicles.
Key Features
- Advanced Fuel Delivery: Optimizes combustion efficiency for low-speed operations, enhancing throttle response and engine performance.
- Durable Brass Construction: Resists corrosion and wear, ensuring long-lasting reliability in harsh environments.
- Easy Installation: Designed for seamless integration with existing MIKUNI carburetor systems, reducing setup time and complexity.
- Compatibility: Fits most 2-stroke and 4-stroke powersports engines, making it a versatile upgrade solution.
Why Choose This Product
Whether you're tackling rugged terrain or demanding work environments, the MIKUNI Low Speed Jet delivers consistent performance through precise fuel metering. Its robust construction ensures durability, while the optimized jetting improves engine efficiency and reduces fuel waste. Ideal for riders seeking enhanced power delivery without compromising reliability.
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Upgrade your powersports engine's performance with the MIKUNI FN100606-127.5 Low Speed Jet. This high-quality intake system delivers precise fuel-air mixture control, ensuring reliable power output and improved fuel efficiency for a wide range of off-road and utility vehicles.
Key Features
- Advanced Fuel Delivery: Optimizes combustion efficiency for low-speed operations, enhancing throttle response and engine performance.
- Durable Brass Construction: Resists corrosion and wear, ensuring long-lasting reliability in harsh environments.
- Easy Installation: Designed for seamless integration with existing MIKUNI carburetor systems, reducing setup time and complexity.
- Compatibility: Fits most 2-stroke and 4-stroke powersports engines, making it a versatile upgrade solution.
Why Choose This Product
Whether you're tackling rugged terrain or demanding work environments, the MIKUNI Low Speed Jet delivers consistent performance through precise fuel metering. Its robust construction ensures durability, while the optimized jetting improves engine efficiency and reduces fuel waste. Ideal for riders seeking enhanced power delivery without compromising reliability.| SKU | GM620BB00D |
|---|---|
| MPN | FN100606-127.5 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2008-2018 |
| Kawasaki | KX450F | 2010-2020 |
| Yamaha | YZ450F | 2009-2019 |
| Suzuki | RMZ450 | 2012-2022 |
| KTM | 450 SX-F | 2007-2015 |
| Honda | CRF450RX | 2015-2024 |
Frequently Asked Questions
Fits Mikuni VM series (VM34, VM36, VM38), Keihin FCR39/41 (with Mikuni jets), and TM40 pumper carbs commonly found on 250-450cc 4-stroke motocross bikes.
Depends on your bike/model. Typically stock low speed jets are 122-132. 127.5 is mid-range; larger number = richer mixture.
Recommended to check main jet (usually 1 size up/down) and pilot jet for complete tuning. Use a jet kit for best results.
No, this is for carbureted engines only. FI bikes use ECU tuning instead.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet wrench or needle nose pliers
Pro Tips
- Remove float bowl completely for access. Clean jet orifice with carb cleaner before installing new jet. Always rejet in pairs (pilot and main) for balance.
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Damaging o-rings on needle jet
Comparison vs Stock/OEM
Direct OEM replacement or aftermarket upgrade for Keihin/Mikuni carbs. Same brass construction but precision machined for consistent flow.
Improvements
- More precise fuel metering
- Better corrosion resistance
- Easier to source than OEM
Considerations
- Must be properly sized for your setup - not one-size-fits-all
Durability & Warranty
Expected Lifespan
Indefinite (does not wear out)
Warranty
Limited lifetime from Mikuni
Maintenance
Inspect/clean during carb service (every 20-50 hours riding)
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